Hello
As we can see from software log your device has one of the last security level
Quote:
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System: JNY-L21 12.0.0.246(C185E4R4P2)
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Please, re-flash device via factory mode with this firmware version (JNY-LX1 EMUI 10.0.1.111 (C185E2R2P1), which you can find on support area.
Thereafter, try to perform operation once again and send us result.